OPERATION GUIDE Embedded low power radio modem MU-D1-R 915MHz Operation Guide Version 0.99F (Nov. 2010) CIRCUIT DESIGN, INC., 7557-1 Hotaka, Azumino Nagano 399-8303, JAPAN Tel: +81-(0)263-82-1024 Fax: +81-(0)263-82-1016 E-mail: info@circuitdesign.jp Web site: http://www.circuitdesign.
OPERATION GUIDE Chapter 1 The MU-D1-R 1.1 Outline The MU-D1-R is an FCC part15 compliant embedded low power radio modem for transmission of serial data. Since it is possible to control the radio component using dedicated simple commands, the user can concentrate on developing the transmitting and receiving programs for their system. The commands of MU-D1-R are compatible with the commands used for Circuit Design’s MU-1 and MU-2 series.
OPERATION GUIDE 1.3 Example of the Control Method The VCC terminal of the MU-D1-R is connected directly to the power source of the mounted CPU. Ensure that the voltage of the power supply is regulated to within DC +4.0 v to +5.0 v. Basically the MU-D1-R uses hardware flow control with RTS or CTS, however 3-line control can be used without the hardware flow control. In this case, set the CTS terminal to Low level. In addition, care is required with the timing of transmitting and receiving.
OPERATION GUIDE 2.3 Channel Table The frequency channels that the MU-D1-R can use are channels 1 to 20 in the 915 MHz band. To set the channel, use the command format ‘@CH + channel number’. Example: Set channel 15 as the channel to use. Specify the channel following ‘@CH’ with 2 ASCII (hexadecimal) characters. @CH 0F CRLF *CH = 0F CRLF Control command: Control response: * MU-D1-R : Default channel 915 MHz Channel Frequency Channel Frequency Dec. (Hex) MHz Dec. (Hex) MHz 1(01) 905.
OPERATION GUIDE Chapter 9 Regulatory Compliance 9.1 Regulatory Compliance of the MU-D1-R USA-Federal Communications Commission (FCC) The MU-D1-R complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.
OPERATION GUIDE Important notice • Customers are advised to consult with Circuit Design sales representatives before ordering. Circuit Design believes the provided information is accurate and reliable. However, Circuit Design reserves the right to make changes to this product without notice. • Circuit Design products are neither designed nor intended for use in life support applications where malfunction can reasonably be expected to result in significant personal injury to the user.
